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| Number | Title | Issue Date |
| 4408267 | DC-to-DC Switching converters DC-to-dc switching converters that deliver non-pulsating output current use a conventional transformer and a flyback transformer with primary windings recurrently connected in series to the primary d-c energy source and with secondary windings alternately... | 10/04/1983 |
| 4404623 | Method and apparatus for balancing flux in a power transformer circuit Method and apparatus are disclosed for use with switching power transformer circuits for balancing and compensating for core flux caused by unswitched D.C. current flowing in the transformer. A method and apparatus for adjusting the duty cycle of the swit... | 09/13/1983 |
| 4399499 | Bi-lateral four quadrant power converter A power converter which supplies AC or positive or negative DC output voltage with positive or negative current while isolating the output voltage from the input power source. This converter includes a pulse width modulator converts power amplitude signal... | 08/16/1983 |
| 4383293 | Isolated DC current sense circuit An inverter circuit is disclosed in which the alternating current output is rectified to become a DC power supply with a regulated output voltage. The inverter is controlled to limit the peak current conducted by the power semiconductors and a current lim... | 05/10/1983 |
| 4373117 | DC to DC converter for line powered modem A DC to DC converter circuit for use in a telephone line powered modem and operative to convert a voltage derived from the telephone line to operating voltages required for modem operation.... | 02/08/1983 |
| 4347558 | Voltage balance control for split capacitors in half bridge DC to DC converter An AC to DC converter that utilizes a split capacitor, half bridge, DC to DC converter compensates for unequal voltages across each member of a split capacitor bank. A voltage balance control circuit senses any differences in voltages across the member ca... | 08/31/1982 |
| 4338658 | Master-slave high current D.C. power supply A high current, low voltage, regulated D.C. power supply incorporating a parallel pair of bridges connected across a D.C. supply and each having alternately switched opposite legs for producing across its output a relatively high frequency A.C. to a stepd... | 07/06/1982 |
| 4333134 | Converters A high frequency converter of push-pull form comprises a center tapped D.C. input supply 16, 17, 18, two solid state switching devices (20, 21) connected in series across the D.C. input terminals, a load circuit including a supersonic frequency transforme... | 06/01/1982 |
| 4325111 | Switched mode regulated DC to DC converter A switched mode regulated DC to DC converter for supplying a regulated voltage to a load includes a switching frequency generator of a switching cycle having positive and negative portions. A device, responsive to the outputs of the switching frequency ge... | 04/13/1982 |
| 4301496 | Use of an inductor within a full bridge d.c.-d.c. power converter A multiple output power converter utilizing a circuit on the primary side of a power transformer so as to convert a direct current input into an alternating current output. Said circuit utilizing transistor switching and free wheeling diodes so as to prov... | 11/17/1981 |
| 4301498 | Voltage converter apparatus having output regulating means Voltage converter apparatus is disclosed having circuitry for regulating the output voltage to maintain it at a regulated value. Use is made of switching devices that switch between their alternative states in a cyclic manner and at a particular frequency... | 11/17/1981 |
| 4300191 | Pulse width modulated current fed inverter power supply A fixed frequency pulse width modulated current fed inverter power supply with imbalance compensation provided by means of a primary inductor in the input circuit. Energy is coupled between the primary inductor in the input and secondary inductor windings... | 11/10/1981 |
| 4298926 | Power converter A DC-to-DC converter employs four transistor switches in a bridge to chop DC power from a source, and a voltage multiplying diode rectifying ladder network to rectify and filter the chopped DC power for delivery to a load. The bridge switches are cross-co... | 11/03/1981 |
| 4291366 | Switching regulated power supply A switching regulated power supply operates over a broad range of input voltage and frequency, and outputs direct current power for computer equipment and the like. The power supply can be paralleled with identical power supplies, thereby satisfying any p... | 09/22/1981 |
| 4266268 | Switching power supply having energy storage inductor in primary circuit of output transformer A switching power supply including a rectifier for rectifying input AC line power to provide a source of DC voltage, an output transformer having a primary winding for receiving power from the DC source and a plurality of secondary output windings for pro... | 05/05/1981 |
| 4264949 | DC to DC power supply A regulated DC to DC power supply of reduced complexity which delivers increased power to the load. The improved circuitry substitutes an inductor for the usual inductor-capacitor-switching transistor arrangements, and drives the inverter circuitry so tha... | 04/28/1981 |
| 4263642 | DC to DC converter A DC to DC converter having an input, an output, and a transformer coupling the input to the output. The converter includes circuit elements in the circuitry connected to the primary winding of the transformer which tune that circuitry to resonate at a fi... | 04/21/1981 |
| 4245285 | Booster-inverter power supply circuit The invention is a booster-inverter power supply circuit for providing a regulated, inverted DC output. It is made up of a conventional booster-regulator power supply circuit and improved by the addition of an inverter circuit. The conventional booster-re... | 01/13/1981 |
| 4217632 | Regulated power supply system including saturable reactor means A regulated power supply system is disclosed including a source of unidirectional electric current, and at least one switch device including a saturable reactor controlled between a saturated condition and an unsaturated condition in a duty cycle such tha... | 08/12/1980 |
| 4213082 | Voltage regulator A voltage regulator for converting an unregulated input voltage into a regulated D.C. voltage. The voltage regulator includes a driver transformer which periodically receives energizing current from a voltage source through a transistor switch. A switchin... | 07/15/1980 |
| 4204147 | Power transfer apparatus A power transfer apparatus includes an impedance matching system coupled between a variable voltage source, e.g., a solar cell array, and a load. A parameter of the load indicative of the power being delivered to the load is sensed and the control signal ... | 05/20/1980 |
| 4201957 | Power inverter having parallel switching elements A full wave bridge inverter includes four switch arms, each including N bipolar, parallel transistor switching elements. During a first interval, emitter-collector paths of all transistors in the first and second arms are forward biased so current flows i... | 05/06/1980 |
| 4194238 | Power supply apparatus A series connection of a pair of dividing capacitors and a series connection of a PNP transistor and an NPN transistor are connected in parallel with a direct current voltage source, a primary winding of a saturable transformer is coupled between the junc... | 03/18/1980 |
| 4183079 | DC-AC inverter In a DC-AC inverter having a switching circuit connected between DC input terminals and being controlled by pulses from an oscillation transformer to provide an AC output from which voltage and current feedbacks are applied to the transformer for maintain... | 01/08/1980 |
| 4135237 | Inverter An inverter includes a pair of switching elements operated by control signals from a signal generator to take two-position action in the same phase or in opposite phases, and a coupling transformer to couple the control signals so that ON actions or ON an... | 01/16/1979 |
| 4122514 | Direct current power supply A direct current voltage power supply in which spaced pulses of current are made to flow through the primary winding of a power transformer. The anode-cathode path of an SCR device is connected from a point on a secondary winding to an output capacitor. A... | 10/24/1978 |
| 4121281 | Direct current converter An improvement in the design of a dc converter with a push-pull oscillator n a bridge connection is disclosed. The design is symmetrical about the bridge diagonal. Each symmetrical half in one bridge branch includes a capacitor and in the other bridge bran... | 10/17/1978 |
| 4105957 | Full wave bridge power inverter A full bridge inverter includes four bipolar transistors of like conductivity type, connected in a bridge circuit including an apex to which a load is connected. During a first time interval, emitter collector paths of a first pair of transistors are conn... | 08/08/1978 |
| 4089049 | Inverter circuit including transformer with shielding of undesired radiations A transformer with an electrostatic shield body between its primary and secondary windings, one end of the shield body being connected to a zero potential point of the primary side from the AC standpoint. This reduces the capacity coupling between the pri... | 05/09/1978 |
| 4071812 | AC Inverter with constant power output A constant voltage square wave inverter drives a load connected as the damping element in an otherwise high Q, resonant matching circuit. The frequency of the inverter is maintained near the resonant frequency of the load circuit to provide substantially ... | 01/31/1978 |
| 4063306 | Actively switched damping circuit This disclosure is of an inverter type power supply including an actively switched damping circuit for limiting voltage transients in the inverter circuitry. Such damping is accomplished by switching an energy absorbing element into parallel circuit relat... | 12/13/1977 |
| 4047089 | Starting circuit for inverter A starting circuit for an inverter includes, at least, a control winding provided in connection with a saturable magnetic core of an input transformer of the inverter, a transistor and a capacitor. When a DC voltage source is activated, a discharge curren... | 09/06/1977 |
| 4039927 | Electrostatic power supply The invention relates to a power supply circuit utilizing a DC input tied to the primary windings of two transformers. A pulse source drives either primary through a selector switch which selects the desired primary to produce a pulsed transformer output ... | 08/02/1977 |
| 4039921 | Inverter radiation suppression A transistor inverter includes at least a pair of switching transistors, a transformer with primary and secondary windings, a DC voltage source with a pair of output terminals and a voltage reference terminal, and a rectifying circuit connected to the sec... | 08/02/1977 |
| 4031452 | Stabilized power supply The stabilization of all of the output voltages of a switching power supply is obtained by varying the time of flow of the current in a semiconductor interrupter circuit with a constant interruption repetition cycle, by controlling the interrupter through... | 06/21/1977 |
| 4031454 | Transistor inverter A transistor inverter includes a pair of switching transistors each having base, emitter and collector electrodes, each of the collector and emitter circuits of which is connected between a DC voltage source through a primary winding of an output transfor... | 06/21/1977 |
| 4024450 | Power transistor switching circuit A circuit employing a transformer secondary winding having a fraction of its turns tapped across the base-emitter junction of a power transistor. A silicon controlled rectifier is connected from the transistor base across the entire secondary winding prov... | 05/17/1977 |
| 4017784 | DC to DC converter The DC to DC converter contains a transformer, having a primary and a secondary winding and a predetermined leakage reactance existing between the primary and the secondary winding. A rectifier circuit is connected to the secondary and a large filter capa... | 04/12/1977 |
| 4017781 | D.C. voltage converter A D.C. to D.C. voltage converter for producing a regulated, adjustable D.C. output voltage from an unregulated D.C. input voltage. An inverter produces alternating rectangular output pulses from the unregulated D.C. input, which are rectified to produce t... | 04/12/1977 |
| 4011494 | Inverter with symmetry correction circuits An inverter switching circuit, for example for a power supply, including semiconductors in push-pull configuration. To compensate for differences (basically in storage time) between the semiconductors in the two limbs the input pulse to each limb is of a ... | 03/08/1977 |
